login
A298840
Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
1
0, 104, 2440, 60497, 3570731, 160441457, 7844725524, 380985444657, 18510417612668, 902275957883352, 43936865148320525, 2140933146128529606, 104313951368150470461, 5082784700709399173199, 247666770498486555848961
OFFSET
1,2
COMMENTS
Column 7 of A298841.
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..1..1..1. .0..0..0..0..1..1..1. .0..0..1..1..1..0..0
..0..1..1..0..1..1..1. .0..0..0..0..1..1..1. .0..0..1..1..1..0..0
..1..1..0..0..1..1..1. .0..0..0..0..1..1..1. .0..0..1..1..1..0..0
..1..0..0..0..1..1..1. .0..0..0..0..1..1..1. .0..0..1..1..1..0..0
CROSSREFS
Cf. A298841.
Sequence in context: A273224 A092714 A297977 * A298628 A281536 A250684
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 27 2018
STATUS
approved